Fly-screen.



TED sTATEs PATENT oEEioE.

CHARLES CALVIN' TREDWAY, OF LORDSBURG, NEW IVlIEXICO.`

FLY-sonnen'.

Application filed July 13, 1918.

To all whom it may concern:

Be it known that l, CHARLES CALVIN TannwAY, a citizen of the UnitedStates, and a resident of Lordsburg, in the county of Crrant and Stateof New Mexico, have invented a new and Improved lily-Screen, of whichthe following is a description.

My invention relates to screens for doors or windows for excluding iiiesand other insects while permitting ventilation, and more particularlythe invention relates to that type of screen in which outlets areprovided to ai'lord egress for the flies, the outlets being of acharacter to minimize the possibility of flies entering through theoutlets.

The general object of my invention is to provide a screen of theindicated character improved in various particulars, whereby certainadvantages and results are obtained among which are the following: (1)rlFhe means to provide the outlets for the flies is oi such a characteras to not curtail the ventilating area of the screen, the complete areaof the opening presented by the screen frame being preserved. (2) rlFheoutlets lead Jfrom the top of a darkened chamber so disposed withrelation to the screen material that immediately upon a fly reaching thetop of the wire mesh he is at the darkened chamber with light onlydirectly ahead to attract him. (3) The darkened chamber is formed at theouter side by a sheet metal strip imperforate except for the fly outletsand at the inner side by the top rail of the screen frame, by reason ofwhich two results follow in that material is economized and the darkenedchamber is co-terminous with the wire mesh without curtailing the areaoi the latter. (il) The upper edge of the metal strip is effectivelysecured to the topLm rail of the screen 'frame by being driven directlyinto the same.

Reference `is to be had to the accom" panying drawing in which- Figure 1is a front view of a portion ol a door screen embodying my invention;and

l? ig. 2 is a transverse vertical section on the line 2 2, Fig. 1.

ln the illustrated example of my invention, 1() represents a portion ofa screen door 1"'"ame having screen material 11. A sheet metal strip 12is provided at the upper edge of the screen material and secured theretoas by a suitable seam 18. rlhe upper edge 14 of the strip 12 is disposedlaterally and Specification of Letters Patent.

Patented J an. 14, 1919.

Serial No. 244,765.

preferably is driven directly into the top rail of the frame 10. llhestrip 12 forms with the top rail of the frame a darkened chamber 17 thelower portion of the top rail of the frame 10 at the bottom beingbeveled as at 15 and the lower portion of the strip 12 being oblique tothe vertical, and parallel or approximately so with said bevcled surface15. 1n the strip 12 is stamped up a longitudinal series oi taperingoutlets 1G, the portion of the strip 12 in which the outlets are formedbeing at the top of the chamber 17, the strip being approximately atright angles to form the front and top walls of said chamber, the rearwall being formed by the beveled surface 15 of the frame 10.

lt will be readily understood that by torming outlets 16 directly in themetal strip, labor and material are greatly economized since thecomplete attachment can be stamped up in a single operation.

The top of the screen material 11 is carried substantially to the planeof the lower edge of the top rail of the frame 10 and therefor the flyupon reaching the top of the screen material is directly at the darkenedcha1nber with light afforded only by the outlets 1G directly ahead ofhim as an attraction for him to continue his upward trend.

lWhen the iy reaches the darkened `chamber, in traveling upward en thescreen material, there is a maximum likelihood of' his continuing to andthrough the outlets and it will be seen that the arrangement involvesthe minimum amount of metal in the strip and at the same time preservesthe ventilating area of the screen.

Having thus described my invention, l claim as new, and desire to secureby Let ters Patent:

A. fly screen of the class described including a trame, screen materialailixed thereto, and a sheet :metal strip secured at its upper edge tothe top rail ot' the frame and at its lower edge to the upper edge ofsaid screen material, said strip 'forming with said top rail a darkenedchamber in front of said rail, the inner wall of said chamber beingformed by the top rail and the front and top walls thereof being formedby said strip, said top wall having outlet openings therein leadingdirectly from said chamber.

CHARLES CALVIN TREDVVAY.

topics of this patent may be obtained for five cents each, byaddressing; the Commissioner of Patents,

Washington, D. C.

